There are a few things to remember with the fuel and the 707. To follow what I mean, open the ‘707 Captain’ FLIGHT MANUAL Part II – Aircraft and Systems (cs707_manual2.pdf) and go to page 88.

They are:
1. Make sure that all the Manifold Valve Switches (42-45) and Transfer Valve Switches (46,47) are OPEN/ON!
2. Keep a close eye on the fuel tanks and when they are almost empty (about 100 - 1000 pounds of fuel remaining), turn the Fuel Boost Pump Switch (16,17,18,19,24,25,26,27,28,29) for that fuel tank OFF. The exception to this is the Fuel Quantity Gauge for the Reserve Tanks (Left & Right Tip tanks) as they do not have a Fuel Boost Pump Switch.

By doing that, you should not have any problems.

Mark